how to erase my profile on a mac book air
how do i erase my whole profile on a 2020 macbook air?
MacBook Air 13″, macOS 12.5
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If you want to erase your Mac, read Erase all content and settings on Mac - Apple Support.
I'm not quite sure what you mean by your "whole profile" though. You can easily erase your User Account by logging out, then logging into a different User Account on that Mac with Administrator privileges, and then following these instructions: Delete a user or group on Mac - Apple Support.